23813840 has 40 divisors (see below), whose sum is σ = 58284960. Its totient is φ = 9023616.

The previous prime is 23813837. The next prime is 23813857. The reversal of 23813840 is 4831832.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6314 + ... + 9353.

It is an arithmetic number, because the mean of its divisors is an integer number (1457124).

Almost surely, 2^23813840 is an apocalyptic number.

23813840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23813840 is an abundant number, since it is smaller than the sum of its proper divisors (34471120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23813840 is a wasteful number, since it uses less digits than its factorization.

23813840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15699 (or 15693 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 23813840 is about 4879.9426226135. The cubic root of 23813840 is about 287.7021741150.

The spelling of 23813840 in words is "twenty-three million, eight hundred thirteen thousand, eight hundred forty".